The BlockHead Owner’s Manual
7
HeadRoom has managed to overcome this problem by convincing Clou Cables and
Grado Labs to build custom headphone cables. The BlockHead’s machined aluminum
front and rear panels hold together two enclosures which house the completely
separate left and right audio channel electronics (hence mono-block). Each non-
inverted and inverted audio channel has completely separate electronics and power
supplies all the way back to separate Avel-Lindburg toroidal transformers (hence
double dual-mono). Yes, this amp has four transformer, four power supplies, and
four audio channels. The amp comes standard with all sorts of sweet stuff like: high
performance Burr-Brown 627 audio op-amps (see the June ’01 Stereophile for a
very intelligent discussion about high performance audio op-amps), very low
temperature coefficient .1% metal film resistors and matched polyphenoline-sulphide
film capacitors in the signal path; Nobel potentiometer, Neutrik connectors, three
step gain control for volume control optimization of various efficiency headphones,
three step filter control, HeadRoom psychoacoustic processor circuit, and much
more. And optionally available stepped attenuators and further audio electronic
component upgrades are available, call us for details.
about the Blockhead...
How about another helpful feature:
The BlockHead
can double as a very good
sounding, fully balanced preamp. Make sure the Processor and Filter switches are
in the OFF position when listening through speakers to avoid goofing up your imag-
ing and frequency response. Because the BlockHead is a fully balanced unit, it is a
good idea to call us on the details of how to hook up the BlockHead to your source.
Using Your Amp as a Preamp
